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Measurement and Instrumentation

Measurement and Instrumentation
Figure show an RC potentiometer to measure AC voltage. It is desire that Vo/Vi should be independent of frequency. The value of C shoud be

 0.09 µF.
 11 µF.
 0.1 µF.
 10 µF.

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Measurement and Instrumentation
The inductance of a certain moving iron ammeter is expressed as L = 2+5θ-θ2 µH. The control spring torque is 2 × 10-6 Nm/radian. Find the deflection in radians for a current of 2A.

 5
 4
 1
 2

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Measurement and Instrumentation
The controlling torque of an indicating instrument ______ as the deflection of the moving system increases.

None of the listed here
Increases
Remains same
Decreases

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Measurement and Instrumentation
If two 300V full scale voltmeters V1 and V2 having sensitivities of 100 kOhm/V and 150 kOhm/V are connected in series to measure 500V then

 V1 = 250V and V2 = 250V.
 V1 = 200V and V2 = 300V.
 V1 = 0V and V2 = 0V.
 V1 = 300V and V2 = 200V.

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Measurement and Instrumentation
The difference between the measured value and the true value is called

 relative error
 gross error
 probable error
 absolute error

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Measurement and Instrumentation
The resistance in the circuit of the moving coil of a dynamometer wattmeter should be

Low
High
None of the listed here
Almost zero

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